package com.day10.exer4;

public class Bank {
    private Customer[] customers;//存放多个客户的数组
    private int numberOfCustomers;//记录客户的个数

    public Bank(){
        customers = new Customer[10];
    }
    //添加客户
    public void addCustomer(String f,String l){
        Customer cust = new Customer(f,l);
//        customers[numberOfCustomers] = cust;
//        numberOfCustomers++;
        //或
        customers[numberOfCustomers++] = cust;
    }

    //获取客户的个数
    public int getNumberOfCustomers(){
        return numberOfCustomers;
    }

    //获取指定位置上的客户
    public Customer getCustomer(int index){
//        return customers[index];//可能报异常
        if(index >= 0 && index < numberOfCustomers){
            return customers[index];
        }
        return null;
    }
}
